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The tungsten filament of a certain 100 W light bulb radiates 2.50 W of light. (The other 97.5 W is carried away by convection and conduction.) The filament has surface area of 0.270 mm2 and an emissivity of 0.950. Find the filament's temperature. (The melting point of tungsten is 3683 K.)K
A rifle is aimed horizontally at a target 47.0 away. The bullet hits the target 1.80 below the aim point. Evaluate the bullet's flight time? What was the bullet's speed as it left the barrel?
A harvest mouse can detect sounds as quiet as -10 . Suppose you are sitting in a field on a very quiet day while a harvest mouse sits nearby at the entrance to its nest. How far is the harvest mouse from the leaf
A fuel pump sends gasoline from a car's fuel tank to the engine at a rate of 6.74x10-2 kg/s. find the speed at which gasoline moves through the fuel line
A 200g ball on a 70-cm-long string is swung in a vertical circle about a point 200 cm above the floor. What was the tension in the string an instant before it broke
500 mL of a liquid with a coefficient of volume expansion of 205x10-6/oC fills to the brim a container that has a coefficient of volume expansion of 105x10-6/oC. how much of the liquid will overflow the container
Two point charges, q1 = 2.0 pC and q2 = -2.0 pC, are separated by 3.6 µm. What is the magnitude of the dipole moment
A circus performer stretches a tightrope between two towers. He strikes one end of the rope and sends a wave along it toward the other tower. find the tension in the tightrope
The three charged particles in the figure below are at the vertices of an isosceles triangle (where d = 3.80 cm). calculate the electric potential at point A, the midpoint of the base
An aluminium cup of 180 cm3 capacities is totally filled with glycerin at 18° C. How much glycerin (in cubic cm) would spill out of the cup if temperature of both the cup and glycerin is increased to 33° C? (The linear expansion coefficient of alumin..
A certain man has skin tissue with the following characteristics: thickness of skin tissue, 3.88mm; surface area, 1.75m^2. estimate the temperature at the surface of the mans skin
Light of wavelength 800nm is incident on a metallic surface. if the stopping potential for the photo-electrons ejected from the metal is 0.35 volts, find the work function for the metal and the longest wavelength incident light that will eject photo-..
The drawing shows an intravenous feeding. With the distance shown, nutrient solution (? = 1010 kg/m3) can just barely enter the blood in the vein. What is the gauge pressure of the venous blood
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